asyncrat | 04105c31ae5c279af8caa8d22410391f0b21b4a6fb426852011932f4f063fe32

General

Target

si.exe
Size

130KB
MD5

c894a24b791013f77cd90631beb2c5ea
SHA1

73ceadbc28aa686461fe3d1afc361a3cb2bee327
SHA256

04105c31ae5c279af8caa8d22410391f0b21b4a6fb426852011932f4f063fe32
SHA512

50f95867e36485c11f45cb86599770296c5431853770be58bc2e3f4961d19a105ea2c8554754bfe2c7768cef7e92c96ae56cfb3e8df650be579e28c39c43185c
SSDEEP

1536:A39qSqQzbdqtnkJLlriMv+vLYq/SWkXftdFXGq0h8v6ZiBPUmZFIOdqDVclN:09qszbdqxm1ihk6kvtfGq0ev3U2WZpY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

mcehonline-48303.portmap.io:48303

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
true
install_file
SearchIndexer.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000b000000012275-14.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2628	SearchIndexer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2816	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2796	si.exe
2796	si.exe
2796	si.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	si.exe
Token: SeDebugPrivilege	2796	si.exe
Token: SeDebugPrivilege	2628	SearchIndexer.exe
Token: SeDebugPrivilege	2628	SearchIndexer.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 2860	2796	si.exe	31
PID 2796 wrote to memory of 2860	2796	si.exe	31
PID 2796 wrote to memory of 2860	2796	si.exe	31
PID 2796 wrote to memory of 2584	2796	si.exe	33
PID 2796 wrote to memory of 2584	2796	si.exe	33
PID 2796 wrote to memory of 2584	2796	si.exe	33
PID 2584 wrote to memory of 2816	2584	cmd.exe	35
PID 2584 wrote to memory of 2816	2584	cmd.exe	35
PID 2584 wrote to memory of 2816	2584	cmd.exe	35
PID 2860 wrote to memory of 2740	2860	cmd.exe	36
PID 2860 wrote to memory of 2740	2860	cmd.exe	36
PID 2860 wrote to memory of 2740	2860	cmd.exe	36
PID 2584 wrote to memory of 2628	2584	cmd.exe	37
PID 2584 wrote to memory of 2628	2584	cmd.exe	37
PID 2584 wrote to memory of 2628	2584	cmd.exe	37

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\si.exe
"C:\Users\Admin\AppData\Local\Temp\si.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "SearchIndexer" /tr '"C:\Users\Admin\AppData\Roaming\SearchIndexer.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2860
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "SearchIndexer" /tr '"C:\Users\Admin\AppData\Roaming\SearchIndexer.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2740
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF641.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2584
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2816
- - C:\Users\Admin\AppData\Roaming\SearchIndexer.exe
    "C:\Users\Admin\AppData\Roaming\SearchIndexer.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2628

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF641.tmp.bat

Filesize
157B

MD5
2898865db97d9f3822b8183170af6093

SHA1
08e1c412b2549f39d220ce8a8e449dd0601a75ed

SHA256
b9ce46fb9cb77f60a181112db645a3a0fa5fb52d0320f740aa5fbd363ea4b236

SHA512
57c014d02a5a74b7e7ac82c2072c1ad0d1e31b8ac0e6dab17b75e875338e535496f073b56a58fec4858e45457e0605a9ef0bbf1acf3b032ec73b37b748f97bd7

Download Submit
C:\Users\Admin\AppData\Roaming\SearchIndexer.exe

Filesize
130KB

MD5
c894a24b791013f77cd90631beb2c5ea

SHA1
73ceadbc28aa686461fe3d1afc361a3cb2bee327

SHA256
04105c31ae5c279af8caa8d22410391f0b21b4a6fb426852011932f4f063fe32

SHA512
50f95867e36485c11f45cb86599770296c5431853770be58bc2e3f4961d19a105ea2c8554754bfe2c7768cef7e92c96ae56cfb3e8df650be579e28c39c43185c

Download Submit
memory/2628-16-0x0000000000BE0000-0x0000000000C06000-memory.dmp

Filesize
152KB

Download
memory/2796-0-0x000007FEF5D43000-0x000007FEF5D44000-memory.dmp

Filesize
4KB

Download
memory/2796-1-0x0000000000840000-0x0000000000866000-memory.dmp

Filesize
152KB

Download
memory/2796-2-0x000007FEF5D40000-0x000007FEF672C000-memory.dmp

Filesize
9.9MB

Download
memory/2796-12-0x000007FEF5D40000-0x000007FEF672C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads